hodograph

[ hod-uh-graf, -grahf ]

/ ˈhɒd əˌgræf, -ˌgrɑf /

the figure described by the extremity of a vector that has a fixed origin and a position vector equal to the velocity of a moving particle.

Origin of hodograph

1840–50; < Greek hod(ós) way + -o- + -graph

The annexed fig. 70 exhibits the various cases, with the hodograph in its proper orientation.

Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 8 |Various
For applications of the hodograph to the solution of kinematical problems see Mechanics.

Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5 |Various
So that we have in the circling electro-magnetic Aether currents a physical explanation for the Hodograph of any planet.

Aether and Gravitation |William George Hooper
In the motion of a projectile under gravity the hodograph is a vertical line described with constant velocity.

Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 8 |Various

The pole O of the hodograph is inside on or outside the circle, according as the orbit is an ellipse, parabola or hyperbola.

Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 8 |Various

hodograph

/ (ˈhɒdəˌɡrɑːf, -ɡræf) /

a curve of which the radius vector represents the velocity of a moving particle

hodographic, adjective

C19: from Greek hodos way + -graph